The climate in Barcelona is Mediterranean and mild. Extreme temperatures seldom occur. The average temperature in July is (minimum/maximum) 20-29º C / 64-84º F. You can check current weather conditions and forecasts here
The currency in Spain is the Euro. A currency calculator can be foundhere
Credit cards - most hotels, restaurants and shops in Barcelona accept major credit cards.
Banks and exchange foreign currency - this service is available at all bank offices. Banks usually only open from Monday to Friday from between 08:00 and 08:30 to 13:30 or 14:00. You may also ask at your bank if they are represented in Barcelona and which opening hours they have. It is also available at currency exchange shops at all major cities, as well as in the main hotels and travel agencies.
Sales tax (VAT) is included in prices quoted.
You are entitled to claim a VAT refund on goods purchased in Spain if you meet the following criteria.
Now you can claim back for the VAT at the heart of the city:
Visitors’ information is available at the Barcelona – El Prat airport, Terminals 1 and 2, and in the City Centre. During ESHRE 2018 there will also be a visitor information service point in the conference center. You can find the closest information point here.
Information about the city can also be found on the visit Barcelona website